Variable length endovascular graft prosthesis adapted to prevent endoleaks

A method of providing a variable length tubular endovascular prosthesis, said method comprising:

• attaching a substantially tubular fluid-tight connecting member, having two axially separated ends, at one end to a substantially tubular first graft member comprising an interior surface, an exterior surface, and an open end, wherein said one end is attached to either said interior surface or said exterior surface of said first graft member;
• attaching the connecting member at another end to a cross-sectional edge at a proximal end of a substantially tubular second graft member engaged coaxially within the first graft member;
• said connecting member being axially compressible and expandable in response to movement of said second graft member and wherein a length of said connecting member is variable and a length of said second graft member is maintained so as to facilitate engagement of said proximal end of the second graft member within the first graft member;
• and
• maintaining a seal between the proximal end of the second graft member and the open end of the first graft member.

A variable length endovascular prosthesis adapted to prevent endoleaks, said prosthesis comprising:

• a substantially tubular first graft member, comprising an interior surface, an exterior surface, and an open end;
• a substantially tubular second graft member engaged coaxially within said first graft member, the second graft member having a proximal end;
• and
• a means having two axially separated ends for permitting axial compression and expansion of said prosthesis in response to movement of said second graft member and wherein a length of said second graft member is maintained to facilitate variable length engagement of said second graft member within said first graft member while maintaining a seal between said graft members, wherein at least a portion of the means for permitting axial compression and expansion of said prosthesis resides within said first graft member with one end that is attached to either said interior surface or said exterior surface of said first graft member and another end that is attached to a cross-sectional edge at said proximal end of said second graft member.